Sensor IDBR probably identified

This is on the M1 Max. 
The sensor IDBR correlates with the Brightness of the screen (screen off = 0A | screen on full brightness ≈ 0,6A). While there is no VDBR (I assume that it would be named that way) that would measure the Voltage directly you can calculate the Voltage from Power Delivery Brightness and the Current ((P/V)=I) to get around 12V which seams to be reasonable.